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#ifndef _M68K_PAGE_H
#define _M68K_PAGE_H
 
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT	12
#define PAGE_SIZE	(1UL << PAGE_SHIFT)
#define PAGE_MASK	(~(PAGE_SIZE-1))
 
#ifdef __KERNEL__
 
#define STRICT_MM_TYPECHECKS
 
#ifdef STRICT_MM_TYPECHECKS
/*
 * These are used to make use of C type-checking..
 */
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd[16]; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
 
#define pte_val(x)	((x).pte)
#define pmd_val(x)	((&x)->pmd[0])
#define pgd_val(x)	((x).pgd)
#define pgprot_val(x)	((x).pgprot)
 
#define __pte(x)	((pte_t) { (x) } )
#define __pmd(x)	((pmd_t) { (x) } )
#define __pgd(x)	((pgd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )
 
#else
/*
 * .. while these make it easier on the compiler
 */
typedef unsigned long pte_t;
typedef struct { unsigned long pmd[16]; } pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;
 
#define pte_val(x)	(x)
#define pmd_val(x)	((&x)->pmd[0])
#define pgd_val(x)	(x)
#define pgprot_val(x)	(x)
 
#define __pte(x)	(x)
#define __pmd(x)	((pmd_t) { (x) } )
#define __pgd(x)	(x)
#define __pgprot(x)	(x)
 
#endif
 
/* m68k_is040or060 is != 0 for a '040 or higher; used numbers are 4 for 68040
 * and 6 for 68060 */
extern int m68k_is040or060;
 
/* This is the cache mode to be used for pages containing page descriptors for
 * processors >= '040. It is in pte_mknocache(), and the variable is defined
 * and initialized in head.S */
extern int m68k_pgtable_cachemode;
 
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
 
/* This handles the memory map.. */
#define PAGE_OFFSET		0
#define MAP_NR(addr)		(((unsigned long)(addr)) >> PAGE_SHIFT)
#define MAP_PAGE_RESERVED	(1<<15)
 
#endif /* __KERNEL__ */
 
#endif /* _M68K_PAGE_H */